Eroare de compilare: user.cpp:1:21: error: iostream.h: No such file or directory user.cpp: In function ‘int main()’: user.cpp:7: warning: unused variable ‘k’ user.cpp:7: warning: unused variable ‘x’ user.cpp:7: warning: unused variable ‘y’ user.cpp:7: warning: unused variable ‘z’ user.cpp:7: warning: unused variable ‘n’ user.cpp:8: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result